diff --git a/.docker/development/php74/Dockerfile b/.docker/development/php74/Dockerfile
index cddd459..3f82994 100644
--- a/.docker/development/php74/Dockerfile
+++ b/.docker/development/php74/Dockerfile
@@ -3,3 +3,6 @@ FROM pugx/poser:php74
 USER root
 
 WORKDIR "/application"
+
+## To generate phar archive: https://github.com/box-project/box
+RUN wget -q -O /usr/bin/box https://github.com/box-project/box/releases/download/3.11.0/box.phar && chmod +x /usr/bin/box
diff --git a/.docker/development/php80/Dockerfile b/.docker/development/php80/Dockerfile
index 54fe96b..589593f 100644
--- a/.docker/development/php80/Dockerfile
+++ b/.docker/development/php80/Dockerfile
@@ -3,3 +3,6 @@ FROM pugx/poser:php80
 USER root
 
 WORKDIR "/application"
+
+## To generate phar archive: https://github.com/box-project/box
+RUN wget -q -O /usr/bin/box https://github.com/box-project/box/releases/download/3.11.0/box.phar && chmod +x /usr/bin/box
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 26569f3..8bbf109 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Added
 * add CircleCI jobs for build and tests with php 8.0
 * add Github actions jobs for build and tests with php 7.4 and php 8.0
+* add phar archive powered by [box-project](https://github.com/box-project/box)
 
 ### Changed
 * refactoring of docker-compose to develop with php74 and php80
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8445b52..1ff29fd 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -55,5 +55,12 @@ $ composer phpspec
 $ composer behat
 ```
 
+## Update version of `phar`
+
+```bash
+docker-compose up --build -d
+docker-compose exec php74 composer box:validate
+docker-compose exec php74 composer box:compile
+```
 
 ## ENJOY
diff --git a/README.md b/README.md
index a3a1339..a3986d6 100644
--- a/README.md
+++ b/README.md
@@ -15,16 +15,37 @@ This library is used by https://poser.pugx.org
 
 to use the library with lower php version use the tag [v1.4](https://github.com/badges/poser/tree/v1.4.0)
 
-## Use as command
+## Use as `phar` command
 
-#### 1. Create a project
+### 1. Download the phar
+```bash
+wget -q -O /usr/local/bin/poser https://github.com/.../poser.phar 
+chmod +x /usr/local/bin/poser
+```
+
+### 2. Launch the command
+
+Create an image
+```bash
+poser license MIT blue -p "license.svg"
+```
+
+Flush an image
+```bash
+poser license MIT blue
+```
+
+
+## Use as `bin` command
+
+### 1. Create a project
 
 ```bash
 composer create-project badges/poser
 ln -s poser/bin/poser /usr/local/bin/poser
 ```
 
-#### 2. Launch the command
+### 2. Launch the command
 
 Create an image
 ```bash
@@ -38,13 +59,13 @@ poser license MIT blue
 
 ## Usage as library
 
-#### 1. Add to composer dependencies
+### 1. Add to composer dependencies
 
 ```bash
 composer require badges/poser
 ```
 
-#### 2. Use in your project as lib
+### 2. Use in your project as lib
 
 ```php
 use PUGX\Poser\Render\SvgPlasticRender;
diff --git a/box.json.dist b/box.json.dist
new file mode 100644
index 0000000..03c7861
--- /dev/null
+++ b/box.json.dist
@@ -0,0 +1,4 @@
+{
+  "force-autodiscovery": true,
+  "output": "poser.phar"
+}
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 6e8aa3e..7241b2d 100644
--- a/composer.json
+++ b/composer.json
@@ -59,7 +59,9 @@
         "docker:build:php74": "docker build -t pugx/poser:php74 -f .docker/base/php74/Dockerfile .",
         "docker:push:php74": "docker push pugx/poser:php74",
         "docker:build:php80": "docker build -t pugx/poser:php80 -f .docker/base/php80/Dockerfile .",
-        "docker:push:php80": "docker push pugx/poser:php80"
+        "docker:push:php80": "docker push pugx/poser:php80",
+        "box:compile": "box compile",
+        "box:validate": "box validate"
     },
     "extra": {
         "branch-alias": {
diff --git a/poser.phar b/poser.phar
new file mode 100755
index 0000000..0dc22a9
Binary files /dev/null and b/poser.phar differ
diff --git a/src/Calculator/GDTextSizeCalculator.php b/src/Calculator/GDTextSizeCalculator.php
index 07e0c19..670a3e2 100644
--- a/src/Calculator/GDTextSizeCalculator.php
+++ b/src/Calculator/GDTextSizeCalculator.php
@@ -19,7 +19,14 @@ class GDTextSizeCalculator implements TextSizeCalculatorInterface
 
     public function __construct()
     {
-        $this->fontPath = __DIR__ . self::TEXT_FONT;
+        if(0 === strpos(__DIR__, 'phar://')) {
+            //Hack to work with phar virtual environment
+            $prefixFontPath = './src/Calculator';
+        } else {
+            $prefixFontPath = __DIR__;
+        }
+
+        $this->fontPath = $prefixFontPath . self::TEXT_FONT;
     }
 
     /**
@@ -28,6 +35,7 @@ public function __construct()
     public function calculateWidth(string $text, int $size = self::TEXT_SIZE): float
     {
         $size = $this->convertToPt($size);
+
         $box  = \imagettfbbox($size, 0, $this->fontPath, $text);
 
         return \round(\abs($box[2] - $box[0]) + self::SHIELD_PADDING_EXTERNAL + self::SHIELD_PADDING_INTERNAL, 1);
diff --git a/src/UI/Command.php b/src/UI/Command.php
index 6b7aa8b..f1152bc 100644
--- a/src/UI/Command.php
+++ b/src/UI/Command.php
@@ -140,7 +140,9 @@ protected function storeImage(OutputInterface $output, string $path, string $ima
         }
         @\fclose($fp);
 
-        $output->write(\sprintf('Image created at %s', $path));
+        $output->writeln('');
+        $output->writeln(\sprintf('Image created at %s', $path));
+        $output->writeln('');
     }
 
     protected function printHeaderOnce(OutputInterface $output): void